Backend

The Utopia backend, i.e. the utopia/core and utopia/data_io libraries, provide a number of supporting structures that help in model implementation and data writing. The FAQs below contain information on both the C++ use of these features as well as their integration and configuration.

Please also refer to the C++ documentation.

• Model Configuration
  • Passing configurations to the model
    • How does my model instance receive its configuration?
    • Can I pass a custom configuration to a model during initialization?
  • Read content from the configuration
    • In my model, how can I read entries from the configuration?
    • How can I read linear algebra objects (vectors, matrices, …) from the config?
  • C++ documentation of Config Utilities
    • Config
    • get_as()
    • get_as()
    • get_as_SpaceVec()
    • get_as_MultiIndex()
    • KeyError
    • SpaceVecType
    • MultiIndexType
• Cell and Agent Managers
  • Entity Traits
    • What are these trait objects needed for manager setup?
  • Initialize cells and agents
    • Which ways are there to initialize cells and agents?
    • Can I use a random number generator when constructing cells or agents?
  • CellManager FAQs
    • Neighborhood calculation
    • Can I change the grid discretization? And when should I?
• Entity Selection
  • Configuration Access
    • When is select_entities accessible via the configuration?
    • Which selection modes are available?
  • Selecting from the CellManager
    • Why can’t I select boundary cells?